Method of molding kettles



(No Model.) '2 Sheets-Sheet 1.

1). M. MGLEAN;

METHOD OF MOLDING KETTLES, &c., WITH HINGE PINS.

Patented Peb.'15, 1887'.

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N PETERS. lholo-LillmgmpWashington. D. C.

(No Model.\ 2 Sheets-Sheet 2.

71).. MdLEAN. METHOD OF MOLDING KBTTLBS, &c., WITH HINGE PINS. No. 357,778. Patented Feb. 15, 1887.

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UNITED STATES PATENT OFFICE.-

DONALD M. MoLEAN, or BOSTON, MASSACHUSETTS.

METHOD OF MOLDING KETTLES, 800., WITH HINGE-PINS.

SPEC'IPICATION forming part of Letters Patent No. 357,778, dated February 15, 1887 Application filed December 9, 1885. Serial No. 185,198. (No model.)

To all whom it may concern.-

Be it known that I, DONALD M. McLEAN, a citizen of the United States, residing at Bos ton, in the county of Suffolk and State of Massachusetts, have invented a new and useful method of producing metal castings wherever applicable by piercing the ears or sides of the pattern to receive a pin or pins, or to cast the same integrally with the body of the vessel; and I do hereby declare that the following is a full, clear, and exact description of my invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in all classes of hollow wares produced fro m cast1netals which are to he provided with hinged covers or lids,and in the method of attaining this result.

My invention therefore consists in the novel manner of manipulating a two-part mold to attain the result hereinafter shown,which consists in uniting the hinge-pin to the ears or proj ectinglugs of the vessel, making the former integral with the latter at one operation, or, where desirable, permitting the molten metal to form a hinge-pin where the dimensions of said pin will insure sufficient strength to sustain the cover or lid of the larger or weightier class of castings. Aeeomplishing this result by my improved method of forming the lugs of the mold obviates the laborious, slow, and expensive process of drilling as heretofore practiced, and avoids the expense consequent from the loss of completed castings, which,

- during the process of casting, have sustained a change of crystallization and become chilled to a degree which renders them impervious to drilling. 7

My improvement in detail is hereinafter specifically described, and illustrated in the accompanying drawings, forming a part of this specification, in which- Figure l exhibits a view in perspective of a two-part tea-kettle flask prepared to receive the molten metal. Fig. 2 is a vertical transverse central section in perspective of the cope of said flask Supported on a molders block and containing the lower half of a teakettle pattern embedded in Sand. Fig. 3 illustrates a perspective view in section, said flask and pattern being inverted to receive the upper part of the pattern and flask.- Fig. 4 indicates a perspective view in section, wherein said upper half of the pattern and flask with the sand have been added. Fig. 5 is a perspective of the drag of the flask containing the sand-mold with the pattern removed. Fig. 6 embraces a view in perspective of the lower part of said flask containing the core and the bottom of the pattern still embedded in the sand. Fig. 7 indicates a top plan of an empty flask resting upon the block. Fig. 8 is a perspective view of the devices supporting the core of the mold in the flask. Fig. 9 illustrates a port-ion of the pattern bearing the lugs or cars, which are pierced to receive a hinge pin. Fig. 10 is a portion of a casting therefrom sustainingone hinge-pin, and Fig. ll is a similar view bearing two short pins. Fig. 12 shows the product.

To carry myinvention into effect, I proceed in the consecutive order illustrated in the several annexed views, commencing with Fig. 2 as the First operation, wherein the lower half or bottom of a tea-kettle pattern, A, is placed upon the mold-block B in an inverted position: The lower portion ofthe flask or drag O is adjusted to conform with said pattern, and the intervening space is then filled with molding-clay or sand properly tempered and compacted with the tamping-iron until the cavity is uniformly filled. The gate D is now formed at the bottom of the drag to receive the molten metal by forcing the sprue E down upon the pattern-bottom, where it remains until the mold is completed. The founder now inverts the drag O, whence it assumes the position as in Fig. 3, and the flask is ready for the Second operation: The parting-sand is strewn over the surface, and the top half of the pattern or breast F is carefully adjusted upon the set pattern, and the upper portion or cope of the flask G is arranged carefully by means of the offsets H and flask-pins I upon the rims of the drag and cope, respectively, as appears in Fig. 3. The interior of the pattern is partially filled with the sand and compacted by hand. At this stage of proceeding the anchor J is inserted within the pattern, the crown K resting about midway the depth of the drag, with the shank L protruding above the top of the cope. The pin M or pins M are now inserted through the holes N in the ears of the pattern, and the interior of said pattern is filled and tamped compactly with Sand to a level with the rim, the sand being also packed on the outside of the pattern between the ears 0 O, and around said 'pin M, thus forming a small projecting block of sand on the core S, pierced by the pin M, as shown in Fig. 6. Parting-sand is now applied to the top of said core, including the aforesaid projeeting block of sand, and the cope is tamped. The anchor-stock P is adjusted over the shank L and secured by the inclined key Q ready for the Third operation: This consists inrcmoving the cope-after ventilating the matrix and removing the key and stock-as appears in Figs. and 6, wherein said cope is lifted from the pattern, the pin or pins withdrawn, and the breast of the pattern removed to expose the matrix R. The pounce-bag is now brought into requisition, containing acomposition of plu mbago and charcoal-dust, which is pounced upon the now'el or core S, to harden the mold and facilitate the flow of the liquid metal, after which said cope G is readjusted upon the drag O, the pin or pins meanwhile being replaced in the mold, when desired to form said pin or pins integral with the casting, or left out if'it is desired to form a cast pin by allowing the molten metal to flow through said holes in the mold, as the process may be elected. The stock and key being replaced, the flask is once more inverted, and the drag and mold are lifted to expose and to permit the removal of the lower half of the pattern and the use of the pounce, asin the manner aforesaid. Beadjusting the parts of the flask and the removal of the sprue completes the mold.

Having described the operation and construction of my improved invention, what I desire to secure by Letters Patent of the United States, and claim, is

The process of forming a mold to make an artielehaving ears with pintles cast therein, consisting in molding the'drag, molding the core inside of a pattern having on its exterior two pierced lugs, inserting a pin or pins through the pierced lugs of the pattern, molding between the lugs of the pattern and around .the pin or pins a pierced lug integral with the core, completing the remainder of the mold, withdrawing the cope, withdrawing the pin or pins from the molded lug, withdrawing the pattern, replacing the pin or pins, and reassembling the mold, all as described.

In witness whereof I have signed this specification in presence of two attesting witnesses.

DONALD M. MOLEAN. W'itnesses:

WM. H. llIILLER, H. E. REMIOK. 

